Message processing method, firewall and readable storage medium

Abstract

The application discloses a message processing method, a firewall, and a readable storage medium. The message processing method includes: receiving a request message sent by a terminal, and when it is determined that the request message contains illegal content, modifying the illegal content to obtain the target message, wherein the content of the target message is legal content; the target message is sent to the controller, so that the controller sends a response message after receiving the target message; receiving the response message, determining that the response message does not contain illegal content, and sending the response message to the terminal. Solve the problem that the connection between the terminal and the controller will be disconnected when the firewall determines that there is illegal content in the packet.

Description

technical field

[0001] The present application relates to the technical field of communication, and in particular to a message processing method, a firewall and a readable storage medium. Background technique

[0002] In the current industrial system, in order to ensure the security of the communication between the terminal and the controller, a firewall is usually used to protect the communication between the terminal and the controller. After the firewall detects that the message sent by the terminal to the controller contains illegal content, the firewall usually adopts two methods to protect the communication security. One is to discard the message. Using this method will trigger the retransmission mechanism of the TCP transmission control protocol. , after repeated retransmission failures, the connection is interrupted; the other is to send a reset message to close the current connection. Using both protection methods will interrupt the connection between the terminal ...

Examples

Embodiment Construction

[0036] It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

[0037] In order to better understand the above-mentioned technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0038] Such as figure 1 as shown, figure 1 It is a schematic diagram of the firewall structure of the hardware operating environment involved in the solution of the embodiment of the present applic...

technical field

[0001] The present application relates to the technical field of communication, and in particular to a message processing method, a firewall and a readable storage medium. Background technique

[0002] In the current industrial system, in order to ensure the security of the communication between the terminal and the controller, a firewall is usually used to protect the communication between the terminal and the controller. After the firewall detects that the message sent by the terminal to the controller contains illegal content, the firewall usually adopts two methods to protect the communication security. One is to discard the message. Using this method will trigger the retransmission mechanism of the TCP transmission control protocol. , after repeated retransmission failures, the connection is interrupted; the other is to send a reset message to close the current connection. Using both protection methods will interrupt the connection between the terminal ...

Examples

Embodiment Construction

[0036] It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

[0037] In order to better understand the above-mentioned technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0038] Such as figure 1 as shown, figure 1 It is a schematic diagram of the firewall structure of the hardware operating environment involved in the solution of the embodiment of the present applic...

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